Muscular Dystrophy

Viagra might help protect the hearts of boys and men with Duchenne and Becker muscular dystrophy, a disease that causes progressive muscle weakness and heart disease. The drug showed promise in mice and is currently being tested in patients.

Lung Disease

Approved to treat hypertension in the lungs, Viagra once held promise for people with chronic obstructive pulmonary disease or COPD. But the drug failed in a clinical trial, worsening symptoms and quality of life.

Altitude Sickness

Viagra can help you rise to the occasion, when mountain climbing, that is. The drug has been shown to soften the symptoms of altitude sickness.

Athletic Performance

Chicago Bears' receiver Brandon Marshall raised eyebrows when he said some NFL players use Viagra as a performance enhancer. While the drug has been proven to boost blood flow, its effects on athletic performance remain unclear.

Jet Lag

Viagra might help fight the effects of jet lag, according to a study in hamsters. Rodents that were fed the little blue pill recovered 50 percent faster than their unmedicated friends after a shift in light-dark cycle.

Cold Extremities

Viagra can help fight the symptoms of Raynaud's phenomenon, a condition that causes arterial spasms that block blood flow to the fingers, toes, ears and nose. Raynaud's can be caused by smoking, autoimmune disease and frostbite.